Which of the following best summarizes the strategic hint "consider equivalent problems with simpler solutions" and provides an example of the meaning? a. a useful approach to a difficult problem is to look for a similar problem, although it may have a different answer. for example, suppose you cannot remember the formula for surface area of a cube. instead, use dimensions of another cube with a known surface area and solve. b. consider equivalent problems with simpler solutions in any case except for when looking for numerical answers. for example, instead of finding an equivalent problem to find surface area of a cube, look for any simpler way to solve the problem. c. a useful approach to a difficult problem is to look for an equivalent problem, which has the same numerical answer but may be easier to solve. for example, suppose you cannot remember the formula for surface area of a cube. instead, find the surface area of each square and add them together. d. a useful approach to a difficult problem is to look for an equivalent problem, which does not have the same numerical answer but may be easier to solve. for example, suppose you cannot remember the formula for surface area of a cube. instead, compare the dimensions to another cube with a known surface area.